Wozniacki sorry for Nadal cramping imitation

World number one Caroline Wozniacki has apologised for any offence caused after she aped Rafael Nadal's cramping episode in her press conference at the US Open last night. The Spaniard stunned the watching media as, while discussing his third-round victory over David Nalbandian on Sunday, he was struck by what was clearly severe pain in his right thigh before sliding onto the floor.

OOps! Caroline Wozniacki celebrates winning the second set against Svetlana Kuznetsova on Monday. Pic/AFP

Initially there was real concern for Nadal but he recovered quickly and was keen to play down the incident as a normal occurrence after a match contested in hot and humid conditions. After her three-hour win over Svetlana Kuznetsova on Tuesday night, Wozniacki, with a big grin on her face, imitated the defending champion by sliding down her chair.

She wrote on Twitter yesterday: "Had a bit of fun last night b4 my press conference.Hope it was not taken the wrong way. I have the upmost (sic) respect and admiration of Rafa!!!!" Wozniacki is no stranger to antics in the press room. At the Australian Open this year, after hearing reports that journalists considered her boring to interview, she spent one press conference pre-empting questions and offering stock answers before inviting journalists to ask her "questions that are a little more interesting".

That led to her being quizzed on Kenny Dalglish's appointment as Liverpool manager and how to solve global warming, while on another occasion she made up a story about being attacked by a kangaroo before later confessing she had been lying. And at Wimbledon she turned from interviewee to interviewer in Novak Djokovic's pre-tournament press conference, asking the Serb a series of questions.